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本文介绍了一种基于Ｙａｈｏｏ层次的自动分类器，此分类器主要是把基于文本数据的机器学习技巧用于Ｙａｈｏｏ的层次结构；讨论了分类文档过程中的文档表示、功能选择和学习方法及相关的算法。
This paper introduces an automatic classifier based on the Yahoo hierarchy. This classifier mainly uses the machine learning techniques based on text data for the Yahoo hierarchy. It discusses the document representation, function selection and learning methods and related Algorithm.